mineral
Orange calcite
Calcite, calcium carbonate (CaCO₃)
AI-generated identification · may be incorrectLikely translucent orange calcite with a pale, cloudy upper area and visible cleavage; calcite has Mohs hardness 3, a vitreous to pearly luster, and a trigonal crystal structure. The image alone cannot confirm the mineral or specific gravity.
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Physical properties
Likely translucent orange calcite with a pale, cloudy upper area and visible cleavage; calcite has Mohs hardness 3, a vitreous to pearly luster, and a trigonal crystal structure. The image alone cannot confirm the mineral or specific gravity.
Formation & geological history
Forms when calcium carbonate precipitates from water or through alteration of carbonate rocks; calcite occurs in rocks spanning much of geological time. Orange color commonly comes from iron-bearing impurities.
Uses & applications
Used in construction and cement manufacture; attractive specimens are collected or sold as decorative stones, though this rough piece is not clearly gem-grade.
Geological facts
Calcite reacts with dilute acid by fizzing and is readily scratched by a copper coin, useful checks for identification.
Field identification & locations
The orange color and apparent cleavage suggest calcite, but confirmation requires simple tests; calcite is widespread in limestone, caves, and hydrothermal veins. Similar-looking minerals include gypsum and feldspar.
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